First liquid argon test of the X-ARAPUCA

Segreto, E.; Machado, A. A.; Fauth, A. C.; Ramos, Ricardo; Souza, G. De; Souza, H. Vieira de; Pimentel, V. L.; Bazetto, M. C. Q.; Ayala-Torres, M.

doi:10.1088/1748-0221/15/05/c05045

Cited by 15 publications

(26 citation statements)

References 4 publications

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“…Another concept is to use dichroic filters combined with WLS to trap light and effectively enlarge the effective surface area instrumented with SiPM sensors. This concept is used in the recently developed ARAPUCA [113], X-ARAPUCA [114] and ArCLight [115] photon detectors.…”

Section: Photon Trapsmentioning

confidence: 99%

Wavelength Shifters for Applications in Liquid Argon Detectors

Kuźniak

Szelc

2020

Instruments

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Wavelength shifters and their applications for liquid argon detectors have been a subject of extensive R&D procedures over the past decade. This work reviews the most recent results in this field. We compare the optical properties and usage details together with the associated challenges for various wavelength shifting solutions. We discuss the current status and potential future R&D directions for the main classes of wavelength shifters.

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Section: Photon Trapsmentioning

confidence: 99%

Wavelength Shifters for Applications in Liquid Argon Detectors

Kuźniak

Szelc

2020

Instruments

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“…where 𝜏 𝑇 = 1294 ± 35 ns is the measured triplet time constant. Assumingthe singlet and triplet contributions to be 0.77 and 0.23 and the theoretical triplet time constant of 1414 ns [9,22,23], P 𝐿 𝐴𝑟 maximum values is +2.6%.…”

Section: Resultsmentioning

confidence: 99%

“…The XA concept has been declined in several sizes: one window size [9] (100 × 75) mm 2 , two windows size (200 × 75) mm 2 , that will be deployed in SBND [10], and 6 windows size (490 × 93) mm 2 , which is the basic photon detection unit for the DUNE far detector module [4]. In the present work we characterize the two window unit that is shown in Fig.…”

Section: The X-arapuca Devicementioning

confidence: 99%

“…The LAr purity actually achieved in each measurement is measured by the triplet halflife for both alphas and muons. Particle identification is based on the F prompt classifier, defined as the ratio of the prompt (<600 ns) to the total charge [9,16]. Figure 12 left shows the events in the plane F prompt versus total charge for an 𝛼-run where cosmic muons also trigger.…”

Section: Measurements In Liquid Argonmentioning

confidence: 99%

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Enhancement of the X-Arapuca photon detection device for the DUNE experiment

Brizzolari,

Brovelli,

Bruni

et al. 2021

Preprint

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In the Deep Underground Neutrino Experiment (DUNE), the VUV LAr luminescence is collected by light trap devices named X-Arapuca, sizing ∼ (480 × 93) mm 2 . Six thousand of these units will be deployed in the first DUNE ten kiloton far detector module. In this work we present the first characterisation of the photon detection efficiency of an X-Arapuca device sizing ∼ (200 × 75) mm 2 via a complete and accurate set of measurements along the cell longitudinal axis with a movable 241 Am source. The MPPCs photosensors are readout by a cryogenic trans-impedance amplifier to enhance the single photoelectron sensitivity and improve the signal-to-noise while ganging 8 MPPC for a total surface of 288 mm 2 . Moreover we developed a new photon downshifting polymeric material, by which the X-Arapuca photon detection efficiency was enhanced of about +50% with respect to the baseline off-shell product deployed in the standard device configuration. The achieved results are compared to previous measurements on a half size X-Arapuca device, with a fixed source facing the center, with no cold amplification stage, and discussed in view of the DUNE full size optical cell construction for both the horizontal and the vertical drift configurations of the DUNE TPC design and in view of liquid Argon doping by ppms of Xe. Other particle physics projects adopting Liquid Argon as target or active veto, as Dark Side and LEGEND or the DUNE Near Detector will take advantage of this novel wavelength shifting material.

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“…Recently, the idea of using Silicon Photomulipltiers (SiPM) has been gaining ground due to their low power consumption, small size, excellent noise performance at liquid argon temperatures and high QE up to 40% [40]. SiPMs can be used as-is or enhanced using lightcollectors such as light-guide bars [41] or a light-trap, such as the ARAPUCA or X-ARAPUCA devices [42]. Another crucial challenge of detecting LAr scintillation light is the registration of VUV light before it is absorbed by the materials, e.g.…”

Section: Detection Of Scintillation Light In Larmentioning

confidence: 99%

Predicting transport effects of scintillation light signals in large-scale liquid argon detectors

2021

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Liquid argon is being employed as a detector medium in neutrino physics and Dark Matter searches. A recent push to expand the applications of scintillation light in Liquid Argon Time Projection Chamber neutrino detectors has necessitated the development of advanced methods of simulating this light. The presently available methods tend to be prohibitively slow or imprecise due to the combination of detector size and the amount of energy deposited by neutrino beam interactions. In this work we present a semi-analytical model to predict the quantity of argon scintillation light observed by a light detector with a precision better than $$10\%$$ 10 % , based only on the relative positions between the scintillation and light detector. We also provide a method to predict the distribution of arrival times of these photons accounting for propagation effects. Additionally, we present an equivalent model to predict the number of photons and their arrival times in the case of a wavelength-shifting, highly-reflective layer being present on the detector cathode. Our proposed method can be used to simulate light propagation in large-scale liquid argon detectors such as DUNE or SBND, and could also be applied to other detector mediums such as liquid xenon or xenon-doped liquid argon.

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First liquid argon test of the X-ARAPUCA

Cited by 15 publications

References 4 publications

Wavelength Shifters for Applications in Liquid Argon Detectors

Wavelength Shifters for Applications in Liquid Argon Detectors

Enhancement of the X-Arapuca photon detection device for the DUNE experiment

Predicting transport effects of scintillation light signals in large-scale liquid argon detectors

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